<template>
  <el-container class="home-container">
    <!--頭部區域-->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--頁面主體區域-->
    <el-container>
      <!--側邊欄-->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          unique-opened
          :collapse='isCollapse'
          :collapse-transition='false'
          :default-active = 'activePath'
          router
        >
          <!--一級菜單-->
          <el-submenu :index="item.id +''" v-for="item in menuList" :key="item.id">
            <!--一級菜單模板區-->
            <template slot="title">
              <!--圖標-->
              <i :class="iconsObj[item.id]"></i>
              <!--文本-->
              <span>{{item.authName}}</span>
            </template>

            <el-menu-item :index="'/'+subItem.path +''" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!--圖標-->
                <i class="el-icon-menu"></i>
                <!--文本-->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--右側內容主體-->
      <el-main>
        <router-view>
        </router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data(){
    return {
      //左側菜單數據
      menuList:[],
      iconsObj:{
        '125':'iconfont el-icon-user',
        '103':'iconfont el-icon-wallet',
        '101':'iconfont el-icon-shopping-bag-2',
        '102':'iconfont el-icon-document',
        '145':'iconfont el-icon-data-line'
      },
      //是否折疊
      isCollapse:false,
      //被激活的連結地址
      activePath: ''
    }
  },
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //獲取所有的菜單
    async getMenuList(){
      const {data:res} = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
      console.log(res)
    },
    //點擊按鈕,切換菜單的折疊與展開
    toggleCollapse(){
      this.isCollapse = ! this.isCollapse
    },
    //保存連結的激活狀態
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath' , activePath)
      this.activePath = activePath
}
  },
}
</script>

<style  lang="less" scoped>
.home-container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.iconfont{
  margin-right: 10px;
}

.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>